Filtering means



Aug. 7, 1945. J, J NAUGLE 2,381,462

FILTERING MEANS Filed June 13, v 1942 2 Sheets-Sheet 1 IN VEN TOR A TTORNEYS Aug. 7, 1945. J. J. NAUGLE FILTERING MEANS Filed June 15, 1942 2 Sheets-sheaf. 2

IN VEN TOR.

Patented Aug; 7, 1945 UNlTED' STATES PATENT OFFICE i I Q I riL'rr-z lflis i inans I I t i Applici t i:1 :u :;?1 Si iii 46,944

9 Claims. (c|.21o 1sa)v My present invention relates to filtering means and aims to devise a means of the general character indicated which is simple in construction,

easy and economical to fabricate and. assemble side of which is connected with a pump inlet 19 whatever liquid it is desired to-filter.

leading from a supply tank 20 adapted to store Near the upper level of thetank I2 there is provided an over-flow pipe 2| connecting back to the supply and which is capable of a wide variety of applitank 20. cations. My present invention also includes a The washing section I3 is provided with an inmethod-of usingthe aforementioned means. r in Pip 2 controlled by e Valve 23 and In the accompanying specification Ishall dec ni in with the p p 22 there is pr scribe and in the annexed drawings show an ilvided another pipe 24 connected with a pump lustrative embodiment of the filtering meansof 4'. The Oppos e of the P p is the present invention. It is, however, to he nected with a pipe 25 leading to a source of hot clearly understood that I do not wish to b limwater as wil he e after be e fully explained: ited to the exact details herein shown afrd,-.dee washing section is comp t y an O e scribed for purposes of illustration only "inas-. fl w P pe t e inlet end o Which s a ja e t much as changes may be made without the exthe upper level of the tank. ercise of invention and within the scope of the In the sludge section M, the conventional fiat claims hereto appended. bottom wall is replaced by a conical wall 26 the In the accompanying specification I shall als p x of which communicates with an'outlet p describe an illustrative embodiment of the meth- 21 controlled y a valve. Ccnne'cted with the od of using the means of the present invention Outlet p pe 21 is a P p 29 for removin the and here too it is to be clearly understood that broken cake which wi l be accumulated in t s I do not wish to be limited to the exact details ion of the t nk as will hereinafter be more set forth. Nor is the means of the present infully described- Resting at the bottom of the vention to'be limited in its use to the method section [4, adjacent the base of the conical wall of the present invention and vice versa. 26 is a grid 30 ompri o p r ity of lon i- In the accompanying drawings, tudinal bars 3| and a plurality of transverse bars Figure 1 is a partially schematic, partially lont egr v ng connected therewith a D gitudinal sectional view of a system of filtrati ra'lity of cables 33 extending up through the tank made in accordance with the aforesaid illustraand being trai Over p y 34 and n xtive embodiment of the present invention; 30 tending downwardly outside of the tank and be- Figure 2 is a transverse sectional view taken -illg secured o drums the arrangement being along line 22 of Figure 1, the sa b i parsuch that rotation of the drums 35 results in rais-t tially broken away to more clearly show the'inner ing and lowering of the gr 30 r a P p construction; to be hereinafter fully set'forth. Figure 3 is a view similar to Figure 2 b t h 35 I There is adapted to beused in connection within a modified form of filter leaf intended to be tank described, a filtering means '3 he filused as part of the, system as a whole; and ng means including a Pair of I beams 3 i ure 4 is an enlarged detailed planned view which are intended to rest upon the upper edges of a scrubbing washer comprising a part of the of the tank and support the filter leaves later filter leaf shown in Figure 3. to be described. Secured to the transverse I Referring now in detail to the aforesaid illuse beams is a P o t inal channel members trative embodiment of. the present invention 38 r m which pen a plurality f l lr and with particular reference to Figures 1 and leaves 9- 2 of the drawings illustrating the same, numeral Each filter leaf includes a rigid channel mem- -l0 generally designates an oblong tank provided 40 at h 1 thereof a a id bar 4| at with a plurality of partitions II dividing the tank the bottom thereof, the members 40 and Al beinto three compartments l2, l3, and I4, the ing connected by a multiplicity of chain links 42 first of these compartments being kn wna a,v sothat the whole structure becomes completely filtering section, the second as a washing section flexible or articulate Ri n fr m the channel nd th la t as l d s ti n, K member 40 is a pair of coupled outlet pipes 43 v The filtering section [2 includes an inlet-drain communicating with a fitting 44 provided with pipe l5 controlled by a valve l6. Communicata sight glass 45 which enables watchin the 1 ing ith t pipe [5 is pump t t i [1 1 erationof each individual leaf, and a clean-out turn communicating with a pump l8 the other Plu 46, each fitting 44 communicating with a- 'main manifold 41. The top and bottom-rigid adapted to ride along on an overhead cable IO, theotherendofthehoseit communicating with a filtrate-receiver inlet II controlled by a valve I with which a filtrate tank I is provided adjacentthe lower endthercof. 'Iheupperenrlof' the filtrate tankfor receiver communicates with apipe 82 inturn withaconventional 63which,throughapipe ,isconnected with a pump (not shown) for drawing a vacmnn. The filtrate receiver il-is completed byanoutletpipe iiinthebottomwallthereof which communicates with an exhaust pump 60.

Adiacentthe sludgetank l3 thereisprovided ahotwaterstand pipe I whichmaybe coupled,- ashereinafter set forth, by means of a flexible hose 6|, with the main manifold 41. a

This completes the description of the first embodiment of the filtering means of the present inventionj and the method which it is preferred filter cake previously deposited thereon is easily removedanddropsthroughthegridintothe bottom of the sludge section from where, to-

gether with the cleaning water forced through the filter leaves it. is removed by means of the pump 2..

If desired, and while the filter assembly is being cleaned in the sludge section ll, another or duplicate filter assembly may be in operation in the filtering section I2 so that the-system can be operated continuously or with very little interruption.

-This completes the description of the method which I prefer to have used with the filtering means of the present invention.

The device hereinbefore described is made almost entirely of metal and is admirably adapted for use in the filtering of sugar solutions or any other liquids" which do not attack metal. However, many solutions such as acids, alkalies, etc., cannot be'filter'ed in devices of this typ 11188- much as they have a'tendency' to attack the materials of which the devices are made. In order to overcome this disadvantage I propose the following modification of the foregoing filteringesystem:

I provide the tank II with a glass lining I0 I and I substitute in the sludge section It a glass to be used therewith may be described as follows:

With the filter assembly lowered into the filteringsectionl2ofthetankll,theliq1iidtobe filtered, whichisinthesupplytankll ispumped' into the bottom of the section II. The liquid is continually pumped as described so that the excess thereof overflows and is returned to the supplytank. Bysodoing,lamassuredthe even distribution or deposition of the matter to be filtered out of the liquid or the cake. With the flexible hose 56 coupled to the main manifold 41, I draw a vacuum through the filtrate receiver I, hose 56, manifold l1 and interior of the filter grid 'II in place of the 'described.

I againuse a pair of transverse I beams 12 which support a central longitudinal channel 13 from which depend a plurality of glass (outlet pipesnflf connected with a glass manifold (not shown), at their upper ends. The glass outlet pipes ll passthrbugh conventional cloth filter bags 15 and are secured in T fittings I6, each of the latter supporting heavy glass rod ll .at the outer ends of which I provide solid glass links 18 the lower ends of which engage a light glass rod 1!. Suspended from the latter, at each end thereof is a chain 80 made of glass links and Spacedafew links'apart I provide a plurality of glass rodsjl. The rods 8| are each provided metal grid 3| previously with a multiplicity'of glass washers or discs provided with serratedperipheral faces 83. The

to a pre-determined point, I lift the entire filter v assembly out of'the filter section I! by means of the overhead trolley and move the washing section It.

Hot water is then forced into this section through the pump '24 and with the hose it still.

the same into .coupled with the main manifold 41 I continue to forced through'the filter leaves in the reverse direction to the previous'fiow of the filtrate and simultaneously thefgrid ll is raised so as to'colin exactly the same 'manner as set forth in the earlier portion of this specification and are adapted tobe cleanedlthrough the same kind of a scrubbing action; it being obvious that these leaves too are of an articulated or flexible construction which lends itself admirably to the type of scrubbing actionnecessary to obtain proper removal of the'cake from the filter bag.

This completes the entire description of the aforesaid illustrative embodiment of the present invention. and the modification thereof and the method which I prefer to be used in connection therewith and it is to be noted from all of the easy and economical to fabricate and assemble to those snnedm the art to inventionrelates.

lapse the fiexiblefilter leaves 3!. Because (if-the relatlvely close spacing of the filter leavesthis together in the manner of;scruhbingfso thatQtheJ and practice and whigh is admirably adapted to perform the intendedfunctions.

. V Other"obiects and advantages of the device and method of the present invention will readily occur .whatliclaim'as my invention is: '1. In'a filtering tank," .an-assemblyjof filter fleaves each'of which includes an articulated inv V j structure, means ,to suspend said filter collapsing action the leaves to be'rubbed f leavesin the tank, a grid normally resting at the bottoinof the tank, and means for moving said which the present grid into engagement with said filter leaves to collapse the latter and cause scrubbing contact between the individual members thereof.

2. In a filtering tank, a plurality of partitions to divide the same into a plurality of compartments, an assembly of filter leaves each of which includes an articulated internal structure, means to suspend said filter leaves successively in said compartments, a grid normally resting at the bottom of one of said compartments, and means for moving said grid intoengagement with said filter leaves to collapse the latter and cause scrubbing contact between the individual members thereof.

3. In a filtering tank, a plurality of partitions to divide the same into filtering, washing and sludge compartments, an assembly of filter leaves each of which includes an articulated internal structure, means to selectively suspend said filter leaves in any one of said compartments, a grid associated with said sludge compartment normally resting at the bottom thereof, and means for moving said grid into engagement with said filter leaves to collapse the latter and cause sembbing contact between the individual members thereof.

4. In a filtering tank, an assembly of non-rigid filter leaves having articulated inner frames, the weight of which maintains the same in normally extended position, means to suspend said filter leaves in the tank, a grid normally resting at the bottom of the tank, and means for moving said grid into engagement with said filter leaves to collapse the latter and cause scrubbing contact between the individual members thereof.

5. In a filtering tank, a plurality of partitions to divide the same into a plurality of compartments, an assembly of non-rigid filter leaves having articulated inner frames, the weight of which maintains the same in normally extended position, means to suspend said filter leaves successively in said compartments, a grid normally resting at the bottom of one of said compartments, and

means for moving said grid into engagement with said filter leaves to collapse the latter and cause scrubbing contact between the individual members thereof.

6. In a filtering tank, a. plurality of partitions to divide the same into filtering, washing and sludge compartments, an assembly of non-rigid filter leaves having articulated inner frames, the weight of which maintains the same in normally extended position, means to selectively suspend said filter leaves in any one of said compartments,

a grid associated with said sludge compartment normally resting at the bottom thereof, and means for moving said grid into engagement with said filter leaves to collapse the latter and cause scrubbing contact between the individual members thereof.

7. A filter leaf comprising a rigid supporting member, a rigid weighting member, a pair of articulated members connecting said supporting and weighting members, a multiplicity of scrubbing elements suspended intermediate said articulated members, and a filter bag enclosing the whole.

8. A filter leaf comprising a rigid supporting member, a, rigid weighting member, and a pair of articulated members connecting said supporting and weighting members, a plurality of spaced rigid rods carried by said articulated members intermediate said supporting and weighting members, a multiplicity of scrubbing elements mounted on each of said rods, and a filter bag enclosing the whole.

9. A filter leaf comprising a rigid supporting member, a rigid weighting member, and a pair of articulated members connecting said supporting and weighting members, a plurality of spaced rigid rods carried by said articulated members intermediate said supporting and weighting members, a multiplicity of scrubbing discs having serrated peripheral faces loosely mounted on each of said rods, and a filter bag enclosing the whole.

JOHN J. NAUGLE. 

